MAINT: download-wheels missing import
MAINT: download-wheels missing import

* add a missing import in the `download-wheels.py` module
that we missed after adding proxy support there a few weeks
ago

mdhaber/scipy,rgommers/scipy,e-q/scipy,vigna/scipy,WarrenWeckesser/scipy,mdhaber/scipy,Eric89GXL/scipy,perimosocordiae/scipy,perimosocordiae/scipy,rgommers/scipy,perimosocordiae/scipy,scipy/scipy,rgommers/scipy,rgommers/scipy,matthew-brett/scipy,WarrenWeckesser/scipy,andyfaff/scipy,vigna/scipy,WarrenWeckesser/scipy,e-q/scipy,andyfaff/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,ilayn/scipy,Stefan-Endres/scipy,andyfaff/scipy,zerothi/scipy,zerothi/scipy,grlee77/scipy,anntzer/scipy,ilayn/scipy,Eric89GXL/scipy,Stefan-Endres/scipy,e-q/scipy,Stefan-Endres/scipy,e-q/scipy,perimosocordiae/scipy,matthew-brett/scipy,Eric89GXL/scipy,tylerjereddy/scipy,matthew-brett/scipy,grlee77/scipy,tylerjereddy/scipy,scipy/scipy,scipy/scipy,tylerjereddy/scipy,mdhaber/scipy,Stefan-Endres/scipy,scipy/scipy,e-q/scipy,ilayn/scipy,perimosocordiae/scipy,grlee77/scipy,WarrenWeckesser/scipy,scipy/scipy,anntzer/scipy,tylerjereddy/scipy,endolith/scipy,endolith/scipy,grlee77/scipy,grlee77/scipy,Eric89GXL/scipy,endolith/scipy,WarrenWeckesser/scipy,matthew-brett/scipy,zerothi/scipy,vigna/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,ilayn/scipy,matthew-brett/scipy,zerothi/scipy,anntzer/scipy,zerothi/scipy,mdhaber/scipy,scipy/scipy,Eric89GXL/scipy,anntzer/scipy,vigna/scipy,mdhaber/scipy,endolith/scipy,ilayn/scipy,anntzer/scipy,mdhaber/scipy,ilayn/scipy,rgommers/scipy,Eric89GXL/scipy,andyfaff/scipy,zerothi/scipy,anntzer/scipy,endolith/scipy,andyfaff/scipy,andyfaff/scipy,vigna/scipy,endolith/scipy